Triphenylphosphine → Racemic (2R,5S,6S)-5-Amino-6-hydroxy-2-methyl-azepane-1-carboxylic acid benzyl ester

関与物質

反応条件

反応手順

Triphenylphosphine (1.94 g, 7.4 mmol) was added to a solution of racemic (2R,5S,6S)-5-azido-6-hydroxy-2-methyl-azepane-1-carboxylic acid benzyl ester (1.5 g, 4.93 mmol) in THF (185 ml) and H2O (0.7 ml), then was heated to 45 degrees C. overnight. The reaction mixture was then diluted with toluene (100 ml×2) and was azeotroped in vacuo by rotary evaporation twice. The resxulting oil was dissolved in MeOH and HCl in Et2O and the resulting salt was collected following filtration and was used in the next reaction without further purification (1.4 g, 90%).

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